An American teenager is sent to stay with relatives in rural Britain, and falls in love with a local boy. Reports start to come in of conflict erupting in Europe, and as events escalate into a Third World War, she finds herself a fugitive living in a dangerous military police state. Thriller based on Meg Rosoff's novel, starring Saoirse Ronan and Tom Holland.

An American girl, sent to the English countryside to stay with relatives, finds love and purpose while fighting for her survival as war envelops the world around her.